Automatic starter switch



June 6, 1950 A. BROOKE ETAL 2,510,460

AUTOMATIC STARTER swncn Filed Jan. 8, 1948 2 Sheets-Sheet l W/Vaumam INVENTORS 1 I BY I I 1 ATTORNEYS.

June 6, 1950 A. BROOKE EIAL AUTOMATIC STARTER SWITCH '2 Sheets-Sheet 2 Filed Jan. 8, 1948 ATTORNEYS.

15. 37 00762 71 Va/umaanmvmoas Patented June 6, 1950 AUTOMATIC STARTER rSWITC'H Albert Brooke and William Naumann, Staten Island, N. Y.

Application-January 8, 1948, Serial No. 1,138

2 Claims.

This invention relates to improvements in .automatic starters for internal combustion engines.

An object of theinventionis to provide an improved automatic starter .fior an internal combustion'engine which will be operated by the turning on of the ignition switch, and which will be automatically stopped when theinternal combustion engine beg-ins its-operation.

Another object of the invention is to provide an improved automatic starter for internal combustion engines which will .be set into operation by the turning "on of the-ignition switch to close an electric circuit including the starter motor, a solenoid switch, an voil pressureswitch, the usual high tension coil and distributor.

A furtherobject of the invention is to rovide an improved automatic starter for internal combustion engines which will be set into operation by the turning on of the ignition switch to close an electric circuit including the starter motor, a solenoid switch, an oil pressure switch, the usual high tension coil and distributor, said oil pressure switch automatically breaking the electric circuit when the internal combustion engine has started and has built up oil pressurelin the oil line to the engine bearings.

,A still further object of the invention is to provide an improved oil pressure switch controlled automatic starter forlinternal combustion engines which will be highly eflicient in operation and relatively inexpensive to manufacture and produce.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of con struction and combinations of parts, hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawings:

Figure 1 is a side elevation of the improved oil pressure switch with a part of its housing being broken away to show the interior construction thereof, and connected with the other essential parts of the automatic starter, with the oil pressure switch shown in closed position.

Figure 2 is a plan sectional view taken on line 2-2 of Figure 1.

Figure 3 is a similar view to that shown in Figure 1, but with the oil pressure switch shown in open'position.

Figure 4 is a diagrammatic view of the wiring circuits used with the automatic starter.

Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts.

In carryingzout the invention, there is provided an improved form of oil pressure switch including an outer housing or casing having an upper portion I formed with a laterally extending flange '2 about its lower end, and a cooperating lower portion 3 formed withalaterally-extending flange 4 about its upper end.

Acon-tact holder lot-insulated material is supported between the flanges 2 and-4, and supports the diametrically opposed contacts -6 and 1, secured thereto by means of the screws 8. The holder 5 is centrally :apertured'as at=9 to-perrnit the vertic-almovement of the switch actuating push rod M, hereinafter more fully described.

The oilpipellin'e H is connected axially through the lower portion 3 of the oil pressure switch *casing by means of the nut 12 which threads on to the lower end of the flanged fitting 13 which supports the bellows 14 disposed in the said lower portion 3 of the switch :casing. A socket l5 is formed in the upper end of the fitting l3 and supports the lower end of the push rod II] which is formed with an annular flange l'6 adjacent its upper end.

A -contact washer l-l having oppositely disposed depending contacts l8 and I9 is provided, "and is centrally apertured to receive the upper end of the switch actuating push rod ID, the flange l6 extending in contact with the lower surface of the washer I l for supporting the same.

Vertically spaced insulated bushings 2|] and 2| are separated by a coil spring 22, the same being vertically and adjustably supported in a depending tubular collar 23 formed on the top of the upper portion l of the switch casing. A set adjusting screw 24 is threaded into the upper end of the collar 23 in contact with the bushing 20 for selectively varying the operating tension of the switch.

The oil pipe line I I will be connected with the oil pump (not shown) driven by the internal combustion engine (also not shown), and the contact i will be connected by the conductor 25 with the ignition switch 26, and with the usual high tension coil 2'! which will be connected to the distributor 28 and grounded at 29.

The other side of the ignition switch 26 will be connected by the conductor 30 to a solenoid switch 3 l and from thence will connect with the contact 6 by means of the conductor 32. The other side of the solenoid switch 3| will be connected by the conductor 33 to the starter motor 34, which in turn will be connected to the ground 35. The conductor 30 will be connected to one side of the storage battery 36, and the other side of the bat tery will connect with the ground 31.

In operation, the ignition switch 26 will be closed and the circuit including the battery 38, solenoid switch 3|, and starter motor 34 will be closed and the internal combustion engine (not shown) will be turned over by the starter motor 34. As soon as the internal combustion engine starts to run, the pressure of the oil will be built up in the line H and in the bellows 14 to raise the actuating push rod I upwardly, thereby separating the contacts l8 and Hi from the contacts 6 and I, thence turning oil or stopping the starter motor 34. Should the internal combustion stop while the ignition switch 26 was closed, the oil pressure would drop, thence again closing the contacts 18 and I9 with the contacts 6 and 1 to again crank the engine.

While the preferred embodiment of the instant invention has been illustrated and described, it will be understood that it is not intended to limit the scope of the invention thereto, as many minor changes in detail of construction may be resorted to withoutdeparture from the spirit of the invention.

What is claimed is:

1. In a fluid pressure switch, a body portion, a contact holder supported within the body portion, said contact holder having a central opening, contacts mounted on the contact holder, a fluid pipe extending into the body portion, spaced bellows supported on the fluid pipe within the body portion and forming a part thereof, into which fluid under pressure passes from the pipe, a socket member secured to the uppermost bellows, movable into the central opening of the contact holder as the bellows expands under the action of fluid entering the bellows, a vertically movable contact Washer mounted above the contact holder, contacts on the washer cooperating with thecontacts on the holder completing an electrical circuit, a push rod resting on the socket member engaging the contact holder, elevating the contact holder, disengaging the contacts and breaking the electric circuit when the socket member is elevated, and regulating means for regulating the initial position of the contact washer with respect to the contacts on the contact holder, said regulating means including a tubular collar, an insulated bushing extending into the collar and resting on the contact washer, and a coiled spring mounted in the collar normally urging the bushing into contact with said contact washer.

2. In a fluid pressure switch, a body portion, a contact holder supported within the body portion intermediate the ends thereof, the contact holder being disposed in a horizontal plane, said contact holder having a central opening, contacts mounted on the contact holder, a fluid pipe including superposed bellows, extending into the body portion, a guide member secured to the uppermost bellows and being movable through the central opening of the contact holder, a vertically movable contact supporting washer mounted above the contact holder and having contacts engageable with the contacts of the contact holder in completing a circuit, a push rod engaging said guiding member and being in contact with the washer, whereby said washer is elevated by the pressure of fluid in the bellows, breaking the circuit between the contacts of the contact holder and washer, a tubular collar forming a part of the body portion, an insulated bushing extending into the collar and resting on the washer, adjustable spring means within the tubular collar forcing the insulated bushing downwardly regulating the normal position of the movable washer and contacts supported thereby.

ALBERT BROOKE. WILLIAM NAUMANN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 872,039 Adams Nov. 26, 1907 1,781,289 Levy (Mayo) Nov. 11, 1930 1,881,862 Nacey Oct. 11, 1932 1,908,088 Warner May 9, 1933 2,112,059 Arthur Mar. 22, 1938 2,143,104 Critchfield et a1. Jan. 10, 1939 2,166,498 Lacey July 18, 1939 2,270,608 Sandberg Jan. 20, 1942 2,421,284 Peterson May 27, 1947 

